Downhole shut-in tool

Details Downhole shut-in tool Downhole shut-in tool

2005-10-25

2005-10-25

Neuder, William (Department: 3672)

Wells

Packers or plugs

With controllable passage between central conduit and space...

C166S334100

Reexamination Certificate

active

06957699

ABSTRACT:
The invention provides a downhole shut-in tool for obtaining formation pressure data. The tool includes a fast-closing main valve and a pressure-relief valve operable between open and closed positions to effect periodic sealing and release of formation pressure with respect to the surface.

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